參數(shù)資料
型號: TECO3264
廠商: Lineage Power
英文描述: 32-Channel Echo Canceller(32通道回波清除器)
中文描述: 32通道回聲消除器(32通道回波清除器)
文件頁數(shù): 76/128頁
文件大?。?/td> 2328K
代理商: TECO3264
Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
76
Lucent Technologies Inc.
Register Architecture
(continued)
Page 0 Read/Write Registers 000
07FE
(continued)
A-Law/μ-Law Register
Table 39. A-Law/μ-Law Linear Conversion Register (02E) [1B for DS1, 09 for E1]
Bit
0
Symbol
XCODEC
Parameter Name and Description
X Invert.
This bit selects the polarity of the data in the XPCM input highway.
0 = X noninverted companded code.
1 = X inverted companded code [DS1and E1 recommended value].
Both E1 and DS1 based carrier systems tend to use inverted A-law or
μ
-law coding.
X Input
μ
-Law/A-Law Input Select.
1
XULAW
0 = XPCM input A-law code [E1 recommended value].
1 = XPCM input
μ
-law code [DS1 recommended value].
DS1 based carrier systems tend to use
μ
-law.
E1 based carrier systems tend to use A-law.
Linear PCM Port Enable.
Enable use of XLINEAR linear PCM input port.
2
AEN
0 = Inactive [recommended value].
1 = Active.
May be used for DSP processing external to TECO3264.
C Invert.
Selects the polarity of the data in the CPCM output highway.
3
CCODEC
0 = C noninverted companded code.
1 = C inverted companded code [DS1and E1 recommended value].
C Output
μ
-Law/A-Law Output Select.
4
CULAW
0 = CPCM output A-law code [E1 recommended value].
1 = CPCM output
μ
-law code [DS1 recommended value].
Conversion
μ
-A and A-
μ
Adjustment.
Selects the standard or adjusted code conver-
sion on the CPCM input. Adjusted code refers to the ITU G.711 Recommendation for tan-
dem
μ
-law to A-law conversions with A-law to
μ
-law (
μ
-A followed by A-
μ
) code
conversions and also for tandem A-
μ
and
μ
-A code conversions. Adjusting only 1 bit for a
few code level values in
μ
-A and A-
μ
conversions results in bit transparency for bits [7:0]
in each tandem case with only bit 8 (the least significant bit) changing.
5
CUAADJ
0 = Standard code conversion between X in and C out.
1 = Adjusted code conversion between X in and C out.
Reserved.
Set to 0.
7—6
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